2 Answers
2

The table shows what quality improvement an item will achieve based on
smithing level and if the smithing perk for the item is taken or not.
You can continue to improve on items once they reach Legendary, but
the description will not change.

The first sentence is incorrect. Enchanted gear is not in any way different from non-enchanted gear for purposes of smithing, except for requiring the Arcane Smithing perk. The problem is that some unique items lack a material keyword, which means they do not benefit from %material% smithing perks. If you're playing on PC, you can get mods that fix that problem, check the Skyrim Nexus.
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kotekzotApr 17 '12 at 20:20

@kotekzot I removed the first sentence. I didn't knew about that, thanks =)
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MichelApr 17 '12 at 20:34

Thank you, I managed to do it with enchanted stuff and elixir. Thank :)
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AxiolApr 18 '12 at 10:04

@Axiol I am happy about it, if you need anything else, just come and ask =) we are glad in help a fellow gamer =)
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MichelApr 18 '12 at 14:10

konahrik the final dragon priest mask is able that i know of so far to be upgraded to 82-85(can't fully remember)armor points and when low on health will have a chance of healing you,summoning a dragon priest that is bound to you,raising the dead around you to fight for you and pushing back enemies